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Remote Config Realtime for Web #9221

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tusharkhandelwal8
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This change introduces Realtime Remote Config for the Firebase JavaScript SDK, bringing near-instant configuration updates to web applications. This feature aligns the Web SDK with the functionality already available for mobile platforms since June 2023.

Key Changes:

  • Instant Updates: Web apps can now receive new configuration values almost instantly after they are published, eliminating the need for periodic polling.
  • New onConfigUpdate API: Developers can use a new onConfigUpdate object to define how their application handles and applies these real-time updates, mirroring the familiar API pattern from other platforms.
  • Improved Efficiency: This push-based system is more efficient than the older polling method, reducing unnecessary network requests and improving performance.

Relevant Internal Links:
Project Proposal: go/rc-realtime-for-web
API Proposal: go/realtime-rc-web-api-review
Design Document: go/rc-realtime-web-design

@Samruddhi90
Remote Config realtime for Web (#9199)
a1ccd9a 
* added the api-definition, interfaces, realtime connection and backoffLogic

* Added TODO and comments

* resolved the comment about the spacing problem

* Fix check failures

* Fix yarn failures

* Convert backoff time from seconds to minutes

* Manage HTTP connections based on tab visibility (#9202)

* Added the visibilityMonitor

* minor changes

* resolving the spacing problem
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changeset-bot bot commented Aug 21, 2025 •
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🦋 Changeset detected

Latest commit: 3e5477b

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 4 packages
Name Type
@firebase/remote-config Minor
firebase Minor
@firebase/remote-config-types Minor
@firebase/remote-config-compat Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

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google-oss-bot commented Aug 21, 2025 •
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Size Report 1

Affected Products

  • @firebase/ai

    TypeBase (9b63cd6)Merge (9296353)Diff
    browser45.9 kB46.0 kB+57 B (+0.1%)
    main49.0 kB49.1 kB+57 B (+0.1%)
    module45.9 kB46.0 kB+57 B (+0.1%)

  • @firebase/remote-config

    TypeBase (9b63cd6)Merge (9296353)Diff
    browser22.7 kB39.0 kB+16.3 kB (+71.6%)
    main23.9 kB40.2 kB+16.4 kB (+68.7%)
    module22.7 kB39.0 kB+16.3 kB (+71.6%)

  • bundle

    TypeBase (9b63cd6)Merge (9296353)Diff
    remote-config (getAndFetch)47.8 kB59.4 kB+11.7 kB (+24.4%)

  • firebase

    TypeBase (9b63cd6)Merge (9296353)Diff
    firebase-ai.js35.7 kB35.7 kB+46 B (+0.1%)
    firebase-compat.js800 kB810 kB+10.5 kB (+1.3%)
    firebase-remote-config-compat.js27.9 kB38.7 kB+10.8 kB (+38.5%)
    firebase-remote-config.js32.2 kB43.5 kB+11.3 kB (+35.1%)

Test Logs

  1. https://storage.googleapis.com/firebase-sdk-metric-reports/dI5g6eBR5D.html

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google-oss-bot commented Aug 21, 2025 •
edited
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Size Analysis Report 1

Affected Products

  • @firebase/ai

    • ImagenModel

      Size

      TypeBase (9b63cd6)Merge (9296353)Diff
      size9.19 kB9.24 kB+50 B (+0.5%)
      size-with-ext-deps26.8 kB26.9 kB+50 B (+0.2%)

    • getImagenModel

      Size

      TypeBase (9b63cd6)Merge (9296353)Diff
      size9.35 kB9.40 kB+50 B (+0.5%)
      size-with-ext-deps27.0 kB27.1 kB+50 B (+0.2%)

  • @firebase/remote-config

    • activate

      Size

      TypeBase (9b63cd6)Merge (9296353)Diff
      size12.1 kB23.5 kB+11.4 kB (+94.6%)
      size-with-ext-deps38.3 kB50.0 kB+11.7 kB (+30.6%)

      Dependency

      TypeBase (9b63cd6)Merge (9296353)Diff
      classes

      CachingClient
InMemoryStorage
IndexedDbStorage
RemoteConfig
RestClient
RetryingClient
Storage
StorageCache

      12 dependencies

      CachingClient
EventEmitter
InMemoryStorage
IndexedDbStorage
RealtimeHandler
RemoteConfig
RemoteConfigAbortSignal
RestClient
RetryingClient
Storage
StorageCache
VisibilityMonitor

      + EventEmitter
+ RealtimeHandler
+ RemoteConfigAbortSignal
+ VisibilityMonitor

      variables

      11 dependencies

      APP_NAMESPACE_STORE
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
name
version

      20 dependencies

      API_KEY_HEADER
APP_NAMESPACE_STORE
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
INSTALLATIONS_AUTH_TOKEN_HEADER
MAXIMUM_FETCH_ATTEMPTS
NO_BACKOFF_TIME_IN_MILLIS
NO_FAILED_REALTIME_STREAMS
ORIGINAL_RETRIES
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
REALTIME_DISABLED_KEY
REALTIME_RETRY_INTERVAL
TEMPLATE_VERSION_KEY
name
version

      + API_KEY_HEADER
+ INSTALLATIONS_AUTH_TOKEN_HEADER
+ MAXIMUM_FETCH_ATTEMPTS
+ NO_BACKOFF_TIME_IN_MILLIS
+ NO_FAILED_REALTIME_STREAMS
+ ORIGINAL_RETRIES
+ REALTIME_DISABLED_KEY
+ REALTIME_RETRY_INTERVAL
+ TEMPLATE_VERSION_KEY

      External Dependency

      ModuleBase (9b63cd6)Merge (9296353)Diff
      @firebase/util

      ErrorFactory
FirebaseError
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      ErrorFactory
FirebaseError
assert
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      + assert

    • ensureInitialized

      Size

      TypeBase (9b63cd6)Merge (9296353)Diff
      size11.8 kB23.1 kB+11.4 kB (+96.3%)
      size-with-ext-deps38.0 kB49.6 kB+11.6 kB (+30.6%)

      Dependency

      TypeBase (9b63cd6)Merge (9296353)Diff
      classes

      CachingClient
InMemoryStorage
IndexedDbStorage
RemoteConfig
RestClient
RetryingClient
Storage
StorageCache

      12 dependencies

      CachingClient
EventEmitter
InMemoryStorage
IndexedDbStorage
RealtimeHandler
RemoteConfig
RemoteConfigAbortSignal
RestClient
RetryingClient
Storage
StorageCache
VisibilityMonitor

      + EventEmitter
+ RealtimeHandler
+ RemoteConfigAbortSignal
+ VisibilityMonitor

      variables

      11 dependencies

      APP_NAMESPACE_STORE
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
name
version

      20 dependencies

      API_KEY_HEADER
APP_NAMESPACE_STORE
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
INSTALLATIONS_AUTH_TOKEN_HEADER
MAXIMUM_FETCH_ATTEMPTS
NO_BACKOFF_TIME_IN_MILLIS
NO_FAILED_REALTIME_STREAMS
ORIGINAL_RETRIES
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
REALTIME_DISABLED_KEY
REALTIME_RETRY_INTERVAL
TEMPLATE_VERSION_KEY
name
version

      + API_KEY_HEADER
+ INSTALLATIONS_AUTH_TOKEN_HEADER
+ MAXIMUM_FETCH_ATTEMPTS
+ NO_BACKOFF_TIME_IN_MILLIS
+ NO_FAILED_REALTIME_STREAMS
+ ORIGINAL_RETRIES
+ REALTIME_DISABLED_KEY
+ REALTIME_RETRY_INTERVAL
+ TEMPLATE_VERSION_KEY

      External Dependency

      ModuleBase (9b63cd6)Merge (9296353)Diff
      @firebase/util

      ErrorFactory
FirebaseError
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      ErrorFactory
FirebaseError
assert
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      + assert

    • fetchAndActivate

      Size

      TypeBase (9b63cd6)Merge (9296353)Diff
      size12.8 kB24.2 kB+11.3 kB (+88.1%)
      size-with-ext-deps39.1 kB50.7 kB+11.6 kB (+29.6%)

      Dependency

      TypeBase (9b63cd6)Merge (9296353)Diff
      classes

      CachingClient
InMemoryStorage
IndexedDbStorage
RemoteConfig
RemoteConfigAbortSignal
RestClient
RetryingClient
Storage
StorageCache

      12 dependencies

      CachingClient
EventEmitter
InMemoryStorage
IndexedDbStorage
RealtimeHandler
RemoteConfig
RemoteConfigAbortSignal
RestClient
RetryingClient
Storage
StorageCache
VisibilityMonitor

      + EventEmitter
+ RealtimeHandler
+ VisibilityMonitor

      variables

      11 dependencies

      APP_NAMESPACE_STORE
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
name
version

      20 dependencies

      API_KEY_HEADER
APP_NAMESPACE_STORE
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
INSTALLATIONS_AUTH_TOKEN_HEADER
MAXIMUM_FETCH_ATTEMPTS
NO_BACKOFF_TIME_IN_MILLIS
NO_FAILED_REALTIME_STREAMS
ORIGINAL_RETRIES
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
REALTIME_DISABLED_KEY
REALTIME_RETRY_INTERVAL
TEMPLATE_VERSION_KEY
name
version

      + API_KEY_HEADER
+ INSTALLATIONS_AUTH_TOKEN_HEADER
+ MAXIMUM_FETCH_ATTEMPTS
+ NO_BACKOFF_TIME_IN_MILLIS
+ NO_FAILED_REALTIME_STREAMS
+ ORIGINAL_RETRIES
+ REALTIME_DISABLED_KEY
+ REALTIME_RETRY_INTERVAL
+ TEMPLATE_VERSION_KEY

      External Dependency

      ModuleBase (9b63cd6)Merge (9296353)Diff
      @firebase/util

      ErrorFactory
FirebaseError
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      ErrorFactory
FirebaseError
assert
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      + assert

    • fetchConfig

      Size

      TypeBase (9b63cd6)Merge (9296353)Diff
      size12.5 kB23.7 kB+11.2 kB (+90.0%)
      size-with-ext-deps38.7 kB50.2 kB+11.5 kB (+29.7%)

      Dependency

      TypeBase (9b63cd6)Merge (9296353)Diff
      classes

      CachingClient
InMemoryStorage
IndexedDbStorage
RemoteConfig
RemoteConfigAbortSignal
RestClient
RetryingClient
Storage
StorageCache

      12 dependencies

      CachingClient
EventEmitter
InMemoryStorage
IndexedDbStorage
RealtimeHandler
RemoteConfig
RemoteConfigAbortSignal
RestClient
RetryingClient
Storage
StorageCache
VisibilityMonitor

      + EventEmitter
+ RealtimeHandler
+ VisibilityMonitor

      variables

      11 dependencies

      APP_NAMESPACE_STORE
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
name
version

      20 dependencies

      API_KEY_HEADER
APP_NAMESPACE_STORE
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
INSTALLATIONS_AUTH_TOKEN_HEADER
MAXIMUM_FETCH_ATTEMPTS
NO_BACKOFF_TIME_IN_MILLIS
NO_FAILED_REALTIME_STREAMS
ORIGINAL_RETRIES
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
REALTIME_DISABLED_KEY
REALTIME_RETRY_INTERVAL
TEMPLATE_VERSION_KEY
name
version

      + API_KEY_HEADER
+ INSTALLATIONS_AUTH_TOKEN_HEADER
+ MAXIMUM_FETCH_ATTEMPTS
+ NO_BACKOFF_TIME_IN_MILLIS
+ NO_FAILED_REALTIME_STREAMS
+ ORIGINAL_RETRIES
+ REALTIME_DISABLED_KEY
+ REALTIME_RETRY_INTERVAL
+ TEMPLATE_VERSION_KEY

      External Dependency

      ModuleBase (9b63cd6)Merge (9296353)Diff
      @firebase/util

      ErrorFactory
FirebaseError
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      ErrorFactory
FirebaseError
assert
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      + assert

    • getAll

      Size

      TypeBase (9b63cd6)Merge (9296353)Diff
      size12.9 kB24.3 kB+11.4 kB (+87.9%)
      size-with-ext-deps39.2 kB50.8 kB+11.6 kB (+29.7%)

      Dependency

      TypeBase (9b63cd6)Merge (9296353)Diff
      classes

      CachingClient
InMemoryStorage
IndexedDbStorage
RemoteConfig
RestClient
RetryingClient
Storage
StorageCache
Value

      13 dependencies

      CachingClient
EventEmitter
InMemoryStorage
IndexedDbStorage
RealtimeHandler
RemoteConfig
RemoteConfigAbortSignal
RestClient
RetryingClient
Storage
StorageCache
Value
VisibilityMonitor

      + EventEmitter
+ RealtimeHandler
+ RemoteConfigAbortSignal
+ VisibilityMonitor

      variables

      15 dependencies

      APP_NAMESPACE_STORE
BOOLEAN_TRUTHY_VALUES
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
DEFAULT_VALUE_FOR_BOOLEAN
DEFAULT_VALUE_FOR_NUMBER
DEFAULT_VALUE_FOR_STRING
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
name
version

      24 dependencies

      API_KEY_HEADER
APP_NAMESPACE_STORE
BOOLEAN_TRUTHY_VALUES
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
DEFAULT_VALUE_FOR_BOOLEAN
DEFAULT_VALUE_FOR_NUMBER
DEFAULT_VALUE_FOR_STRING
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
INSTALLATIONS_AUTH_TOKEN_HEADER
MAXIMUM_FETCH_ATTEMPTS
NO_BACKOFF_TIME_IN_MILLIS
NO_FAILED_REALTIME_STREAMS
ORIGINAL_RETRIES
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
REALTIME_DISABLED_KEY
REALTIME_RETRY_INTERVAL
TEMPLATE_VERSION_KEY
name
version

      + API_KEY_HEADER
+ INSTALLATIONS_AUTH_TOKEN_HEADER
+ MAXIMUM_FETCH_ATTEMPTS
+ NO_BACKOFF_TIME_IN_MILLIS
+ NO_FAILED_REALTIME_STREAMS
+ ORIGINAL_RETRIES
+ REALTIME_DISABLED_KEY
+ REALTIME_RETRY_INTERVAL
+ TEMPLATE_VERSION_KEY

      External Dependency

      ModuleBase (9b63cd6)Merge (9296353)Diff
      @firebase/util

      ErrorFactory
FirebaseError
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      ErrorFactory
FirebaseError
assert
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      + assert

    • getBoolean

      Size

      TypeBase (9b63cd6)Merge (9296353)Diff
      size12.8 kB24.2 kB+11.4 kB (+88.8%)
      size-with-ext-deps39.0 kB50.7 kB+11.6 kB (+29.8%)

      Dependency

      TypeBase (9b63cd6)Merge (9296353)Diff
      classes

      CachingClient
InMemoryStorage
IndexedDbStorage
RemoteConfig
RestClient
RetryingClient
Storage
StorageCache
Value

      13 dependencies

      CachingClient
EventEmitter
InMemoryStorage
IndexedDbStorage
RealtimeHandler
RemoteConfig
RemoteConfigAbortSignal
RestClient
RetryingClient
Storage
StorageCache
Value
VisibilityMonitor

      + EventEmitter
+ RealtimeHandler
+ RemoteConfigAbortSignal
+ VisibilityMonitor

      variables

      15 dependencies

      APP_NAMESPACE_STORE
BOOLEAN_TRUTHY_VALUES
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
DEFAULT_VALUE_FOR_BOOLEAN
DEFAULT_VALUE_FOR_NUMBER
DEFAULT_VALUE_FOR_STRING
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
name
version

      24 dependencies

      API_KEY_HEADER
APP_NAMESPACE_STORE
BOOLEAN_TRUTHY_VALUES
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
DEFAULT_VALUE_FOR_BOOLEAN
DEFAULT_VALUE_FOR_NUMBER
DEFAULT_VALUE_FOR_STRING
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
INSTALLATIONS_AUTH_TOKEN_HEADER
MAXIMUM_FETCH_ATTEMPTS
NO_BACKOFF_TIME_IN_MILLIS
NO_FAILED_REALTIME_STREAMS
ORIGINAL_RETRIES
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
REALTIME_DISABLED_KEY
REALTIME_RETRY_INTERVAL
TEMPLATE_VERSION_KEY
name
version

      + API_KEY_HEADER
+ INSTALLATIONS_AUTH_TOKEN_HEADER
+ MAXIMUM_FETCH_ATTEMPTS
+ NO_BACKOFF_TIME_IN_MILLIS
+ NO_FAILED_REALTIME_STREAMS
+ ORIGINAL_RETRIES
+ REALTIME_DISABLED_KEY
+ REALTIME_RETRY_INTERVAL
+ TEMPLATE_VERSION_KEY

      External Dependency

      ModuleBase (9b63cd6)Merge (9296353)Diff
      @firebase/util

      ErrorFactory
FirebaseError
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      ErrorFactory
FirebaseError
assert
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      + assert

    • getNumber

      Size

      TypeBase (9b63cd6)Merge (9296353)Diff
      size12.8 kB24.2 kB+11.4 kB (+88.8%)
      size-with-ext-deps39.0 kB50.7 kB+11.6 kB (+29.8%)

      Dependency

      TypeBase (9b63cd6)Merge (9296353)Diff
      classes

      CachingClient
InMemoryStorage
IndexedDbStorage
RemoteConfig
RestClient
RetryingClient
Storage
StorageCache
Value

      13 dependencies

      CachingClient
EventEmitter
InMemoryStorage
IndexedDbStorage
RealtimeHandler
RemoteConfig
RemoteConfigAbortSignal
RestClient
RetryingClient
Storage
StorageCache
Value
VisibilityMonitor

      + EventEmitter
+ RealtimeHandler
+ RemoteConfigAbortSignal
+ VisibilityMonitor

      variables

      15 dependencies

      APP_NAMESPACE_STORE
BOOLEAN_TRUTHY_VALUES
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
DEFAULT_VALUE_FOR_BOOLEAN
DEFAULT_VALUE_FOR_NUMBER
DEFAULT_VALUE_FOR_STRING
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
name
version

      24 dependencies

      API_KEY_HEADER
APP_NAMESPACE_STORE
BOOLEAN_TRUTHY_VALUES
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
DEFAULT_VALUE_FOR_BOOLEAN
DEFAULT_VALUE_FOR_NUMBER
DEFAULT_VALUE_FOR_STRING
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
INSTALLATIONS_AUTH_TOKEN_HEADER
MAXIMUM_FETCH_ATTEMPTS
NO_BACKOFF_TIME_IN_MILLIS
NO_FAILED_REALTIME_STREAMS
ORIGINAL_RETRIES
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
REALTIME_DISABLED_KEY
REALTIME_RETRY_INTERVAL
TEMPLATE_VERSION_KEY
name
version

      + API_KEY_HEADER
+ INSTALLATIONS_AUTH_TOKEN_HEADER
+ MAXIMUM_FETCH_ATTEMPTS
+ NO_BACKOFF_TIME_IN_MILLIS
+ NO_FAILED_REALTIME_STREAMS
+ ORIGINAL_RETRIES
+ REALTIME_DISABLED_KEY
+ REALTIME_RETRY_INTERVAL
+ TEMPLATE_VERSION_KEY

      External Dependency

      ModuleBase (9b63cd6)Merge (9296353)Diff
      @firebase/util

      ErrorFactory
FirebaseError
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      ErrorFactory
FirebaseError
assert
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      + assert

    • getRemoteConfig

      Size

      TypeBase (9b63cd6)Merge (9296353)Diff
      size12.5 kB23.9 kB+11.4 kB (+91.8%)
      size-with-ext-deps45.6 kB57.3 kB+11.7 kB (+25.7%)

      Dependency

      TypeBase (9b63cd6)Merge (9296353)Diff
      classes

      CachingClient
InMemoryStorage
IndexedDbStorage
RemoteConfig
RestClient
RetryingClient
Storage
StorageCache

      12 dependencies

      CachingClient
EventEmitter
InMemoryStorage
IndexedDbStorage
RealtimeHandler
RemoteConfig
RemoteConfigAbortSignal
RestClient
RetryingClient
Storage
StorageCache
VisibilityMonitor

      + EventEmitter
+ RealtimeHandler
+ RemoteConfigAbortSignal
+ VisibilityMonitor

      variables

      11 dependencies

      APP_NAMESPACE_STORE
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
name
version

      20 dependencies

      API_KEY_HEADER
APP_NAMESPACE_STORE
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
INSTALLATIONS_AUTH_TOKEN_HEADER
MAXIMUM_FETCH_ATTEMPTS
NO_BACKOFF_TIME_IN_MILLIS
NO_FAILED_REALTIME_STREAMS
ORIGINAL_RETRIES
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
REALTIME_DISABLED_KEY
REALTIME_RETRY_INTERVAL
TEMPLATE_VERSION_KEY
name
version

      + API_KEY_HEADER
+ INSTALLATIONS_AUTH_TOKEN_HEADER
+ MAXIMUM_FETCH_ATTEMPTS
+ NO_BACKOFF_TIME_IN_MILLIS
+ NO_FAILED_REALTIME_STREAMS
+ ORIGINAL_RETRIES
+ REALTIME_DISABLED_KEY
+ REALTIME_RETRY_INTERVAL
+ TEMPLATE_VERSION_KEY

      External Dependency

      ModuleBase (9b63cd6)Merge (9296353)Diff
      @firebase/util

      ErrorFactory
FirebaseError
calculateBackoffMillis
deepEqual
getModularInstance
isIndexedDBAvailable

      ErrorFactory
FirebaseError
assert
calculateBackoffMillis
deepEqual
getModularInstance
isIndexedDBAvailable

      + assert

    • getString

      Size

      TypeBase (9b63cd6)Merge (9296353)Diff
      size12.8 kB24.2 kB+11.4 kB (+88.8%)
      size-with-ext-deps39.0 kB50.7 kB+11.6 kB (+29.8%)

      Dependency

      TypeBase (9b63cd6)Merge (9296353)Diff
      classes

      CachingClient
InMemoryStorage
IndexedDbStorage
RemoteConfig
RestClient
RetryingClient
Storage
StorageCache
Value

      13 dependencies

      CachingClient
EventEmitter
InMemoryStorage
IndexedDbStorage
RealtimeHandler
RemoteConfig
RemoteConfigAbortSignal
RestClient
RetryingClient
Storage
StorageCache
Value
VisibilityMonitor

      + EventEmitter
+ RealtimeHandler
+ RemoteConfigAbortSignal
+ VisibilityMonitor

      variables

      15 dependencies

      APP_NAMESPACE_STORE
BOOLEAN_TRUTHY_VALUES
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
DEFAULT_VALUE_FOR_BOOLEAN
DEFAULT_VALUE_FOR_NUMBER
DEFAULT_VALUE_FOR_STRING
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
name
version

      24 dependencies

      API_KEY_HEADER
APP_NAMESPACE_STORE
BOOLEAN_TRUTHY_VALUES
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
DEFAULT_VALUE_FOR_BOOLEAN
DEFAULT_VALUE_FOR_NUMBER
DEFAULT_VALUE_FOR_STRING
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
INSTALLATIONS_AUTH_TOKEN_HEADER
MAXIMUM_FETCH_ATTEMPTS
NO_BACKOFF_TIME_IN_MILLIS
NO_FAILED_REALTIME_STREAMS
ORIGINAL_RETRIES
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
REALTIME_DISABLED_KEY
REALTIME_RETRY_INTERVAL
TEMPLATE_VERSION_KEY
name
version

      + API_KEY_HEADER
+ INSTALLATIONS_AUTH_TOKEN_HEADER
+ MAXIMUM_FETCH_ATTEMPTS
+ NO_BACKOFF_TIME_IN_MILLIS
+ NO_FAILED_REALTIME_STREAMS
+ ORIGINAL_RETRIES
+ REALTIME_DISABLED_KEY
+ REALTIME_RETRY_INTERVAL
+ TEMPLATE_VERSION_KEY

      External Dependency

      ModuleBase (9b63cd6)Merge (9296353)Diff
      @firebase/util

      ErrorFactory
FirebaseError
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      ErrorFactory
FirebaseError
assert
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      + assert

    • getValue

      Size

      TypeBase (9b63cd6)Merge (9296353)Diff
      size12.8 kB24.1 kB+11.4 kB (+89.1%)
      size-with-ext-deps39.0 kB50.6 kB+11.6 kB (+29.8%)

      Dependency

      TypeBase (9b63cd6)Merge (9296353)Diff
      classes

      CachingClient
InMemoryStorage
IndexedDbStorage
RemoteConfig
RestClient
RetryingClient
Storage
StorageCache
Value

      13 dependencies

      CachingClient
EventEmitter
InMemoryStorage
IndexedDbStorage
RealtimeHandler
RemoteConfig
RemoteConfigAbortSignal
RestClient
RetryingClient
Storage
StorageCache
Value
VisibilityMonitor

      + EventEmitter
+ RealtimeHandler
+ RemoteConfigAbortSignal
+ VisibilityMonitor

      variables

      15 dependencies

      APP_NAMESPACE_STORE
BOOLEAN_TRUTHY_VALUES
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
DEFAULT_VALUE_FOR_BOOLEAN
DEFAULT_VALUE_FOR_NUMBER
DEFAULT_VALUE_FOR_STRING
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
name
version

      24 dependencies

      API_KEY_HEADER
APP_NAMESPACE_STORE
BOOLEAN_TRUTHY_VALUES
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
DEFAULT_VALUE_FOR_BOOLEAN
DEFAULT_VALUE_FOR_NUMBER
DEFAULT_VALUE_FOR_STRING
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
INSTALLATIONS_AUTH_TOKEN_HEADER
MAXIMUM_FETCH_ATTEMPTS
NO_BACKOFF_TIME_IN_MILLIS
NO_FAILED_REALTIME_STREAMS
ORIGINAL_RETRIES
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
REALTIME_DISABLED_KEY
REALTIME_RETRY_INTERVAL
TEMPLATE_VERSION_KEY
name
version

      + API_KEY_HEADER
+ INSTALLATIONS_AUTH_TOKEN_HEADER
+ MAXIMUM_FETCH_ATTEMPTS
+ NO_BACKOFF_TIME_IN_MILLIS
+ NO_FAILED_REALTIME_STREAMS
+ ORIGINAL_RETRIES
+ REALTIME_DISABLED_KEY
+ REALTIME_RETRY_INTERVAL
+ TEMPLATE_VERSION_KEY

      External Dependency

      ModuleBase (9b63cd6)Merge (9296353)Diff
      @firebase/util

      ErrorFactory
FirebaseError
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      ErrorFactory
FirebaseError
assert
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      + assert

    • isSupported

      Size

      TypeBase (9b63cd6)Merge (9296353)Diff
      size11.9 kB23.3 kB+11.4 kB (+95.4%)
      size-with-ext-deps38.1 kB49.7 kB+11.6 kB (+30.5%)

      Dependency

      TypeBase (9b63cd6)Merge (9296353)Diff
      classes

      CachingClient
InMemoryStorage
IndexedDbStorage
RemoteConfig
RestClient
RetryingClient
Storage
StorageCache

      12 dependencies

      CachingClient
EventEmitter
InMemoryStorage
IndexedDbStorage
RealtimeHandler
RemoteConfig
RemoteConfigAbortSignal
RestClient
RetryingClient
Storage
StorageCache
VisibilityMonitor

      + EventEmitter
+ RealtimeHandler
+ RemoteConfigAbortSignal
+ VisibilityMonitor

      variables

      11 dependencies

      APP_NAMESPACE_STORE
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
name
version

      20 dependencies

      API_KEY_HEADER
APP_NAMESPACE_STORE
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
INSTALLATIONS_AUTH_TOKEN_HEADER
MAXIMUM_FETCH_ATTEMPTS
NO_BACKOFF_TIME_IN_MILLIS
NO_FAILED_REALTIME_STREAMS
ORIGINAL_RETRIES
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
REALTIME_DISABLED_KEY
REALTIME_RETRY_INTERVAL
TEMPLATE_VERSION_KEY
name
version

      + API_KEY_HEADER
+ INSTALLATIONS_AUTH_TOKEN_HEADER
+ MAXIMUM_FETCH_ATTEMPTS
+ NO_BACKOFF_TIME_IN_MILLIS
+ NO_FAILED_REALTIME_STREAMS
+ ORIGINAL_RETRIES
+ REALTIME_DISABLED_KEY
+ REALTIME_RETRY_INTERVAL
+ TEMPLATE_VERSION_KEY

      External Dependency

      ModuleBase (9b63cd6)Merge (9296353)Diff
      @firebase/util

      ErrorFactory
FirebaseError
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable
validateIndexedDBOpenable

      ErrorFactory
FirebaseError
assert
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable
validateIndexedDBOpenable

      + assert

    • onConfigUpdate

      Size

      TypeBase (9b63cd6)Merge (9296353)Diff
      size?23.3 kB? (?)
      size-with-ext-deps?49.7 kB? (?)

      Dependency

      TypeBase (9b63cd6)Merge (9296353)Diff
      functions?

      ensureInitialized
getUserLanguage
isRetriableError
mergeCustomSignals
onConfigUpdate
openDatabase
registerRemoteConfig
setAbortableTimeout
toFirebaseError

      		?
      classes?

      12 dependencies

      CachingClient
EventEmitter
InMemoryStorage
IndexedDbStorage
RealtimeHandler
RemoteConfig
RemoteConfigAbortSignal
RestClient
RetryingClient
Storage
StorageCache
VisibilityMonitor

      		?
      variables?

      20 dependencies

      API_KEY_HEADER
APP_NAMESPACE_STORE
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
INSTALLATIONS_AUTH_TOKEN_HEADER
MAXIMUM_FETCH_ATTEMPTS
NO_BACKOFF_TIME_IN_MILLIS
NO_FAILED_REALTIME_STREAMS
ORIGINAL_RETRIES
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
REALTIME_DISABLED_KEY
REALTIME_RETRY_INTERVAL
TEMPLATE_VERSION_KEY
name
version

      		?
      enums??

      External Dependency

      ModuleBase (9b63cd6)Merge (9296353)Diff
      @firebase/app?

      SDK_VERSION
_registerComponent
registerVersion

      		?
      @firebase/component?

      Component

      		?
      @firebase/logger?

      LogLevel
Logger

      		?
      @firebase/util?

      ErrorFactory
FirebaseError
assert
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      		?

    • setCustomSignals

      Size

      TypeBase (9b63cd6)Merge (9296353)Diff
      size12.3 kB23.6 kB+11.4 kB (+92.4%)
      size-with-ext-deps38.5 kB50.1 kB+11.6 kB (+30.2%)

      Dependency

      TypeBase (9b63cd6)Merge (9296353)Diff
      classes

      CachingClient
InMemoryStorage
IndexedDbStorage
RemoteConfig
RestClient
RetryingClient
Storage
StorageCache

      12 dependencies

      CachingClient
EventEmitter
InMemoryStorage
IndexedDbStorage
RealtimeHandler
RemoteConfig
RemoteConfigAbortSignal
RestClient
RetryingClient
Storage
StorageCache
VisibilityMonitor

      + EventEmitter
+ RealtimeHandler
+ RemoteConfigAbortSignal
+ VisibilityMonitor

      variables

      13 dependencies

      APP_NAMESPACE_STORE
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_KEY_MAX_LENGTH
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
RC_CUSTOM_SIGNAL_VALUE_MAX_LENGTH
name
version

      22 dependencies

      API_KEY_HEADER
APP_NAMESPACE_STORE
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
INSTALLATIONS_AUTH_TOKEN_HEADER
MAXIMUM_FETCH_ATTEMPTS
NO_BACKOFF_TIME_IN_MILLIS
NO_FAILED_REALTIME_STREAMS
ORIGINAL_RETRIES
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_KEY_MAX_LENGTH
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
RC_CUSTOM_SIGNAL_VALUE_MAX_LENGTH
REALTIME_DISABLED_KEY
REALTIME_RETRY_INTERVAL
TEMPLATE_VERSION_KEY
name
version

      + API_KEY_HEADER
+ INSTALLATIONS_AUTH_TOKEN_HEADER
+ MAXIMUM_FETCH_ATTEMPTS
+ NO_BACKOFF_TIME_IN_MILLIS
+ NO_FAILED_REALTIME_STREAMS
+ ORIGINAL_RETRIES
+ REALTIME_DISABLED_KEY
+ REALTIME_RETRY_INTERVAL
+ TEMPLATE_VERSION_KEY

      External Dependency

      ModuleBase (9b63cd6)Merge (9296353)Diff
      @firebase/util

      ErrorFactory
FirebaseError
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      ErrorFactory
FirebaseError
assert
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      + assert

    • setLogLevel

      Size

      TypeBase (9b63cd6)Merge (9296353)Diff
      size11.9 kB23.3 kB+11.4 kB (+95.0%)
      size-with-ext-deps38.2 kB49.8 kB+11.6 kB (+30.5%)

      Dependency

      TypeBase (9b63cd6)Merge (9296353)Diff
      classes

      CachingClient
InMemoryStorage
IndexedDbStorage
RemoteConfig
RestClient
RetryingClient
Storage
StorageCache

      12 dependencies

      CachingClient
EventEmitter
InMemoryStorage
IndexedDbStorage
RealtimeHandler
RemoteConfig
RemoteConfigAbortSignal
RestClient
RetryingClient
Storage
StorageCache
VisibilityMonitor

      + EventEmitter
+ RealtimeHandler
+ RemoteConfigAbortSignal
+ VisibilityMonitor

      variables

      11 dependencies

      APP_NAMESPACE_STORE
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
name
version

      20 dependencies

      API_KEY_HEADER
APP_NAMESPACE_STORE
DB_NAME
DB_VERSION
DEFAULT_CACHE_MAX_AGE_MILLIS
DEFAULT_FETCH_TIMEOUT_MILLIS
ERROR_DESCRIPTION_MAP
ERROR_FACTORY
INSTALLATIONS_AUTH_TOKEN_HEADER
MAXIMUM_FETCH_ATTEMPTS
NO_BACKOFF_TIME_IN_MILLIS
NO_FAILED_REALTIME_STREAMS
ORIGINAL_RETRIES
RC_COMPONENT_NAME
RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS
REALTIME_DISABLED_KEY
REALTIME_RETRY_INTERVAL
TEMPLATE_VERSION_KEY
name
version

      + API_KEY_HEADER
+ INSTALLATIONS_AUTH_TOKEN_HEADER
+ MAXIMUM_FETCH_ATTEMPTS
+ NO_BACKOFF_TIME_IN_MILLIS
+ NO_FAILED_REALTIME_STREAMS
+ ORIGINAL_RETRIES
+ REALTIME_DISABLED_KEY
+ REALTIME_RETRY_INTERVAL
+ TEMPLATE_VERSION_KEY

      External Dependency

      ModuleBase (9b63cd6)Merge (9296353)Diff
      @firebase/util

      ErrorFactory
FirebaseError
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      ErrorFactory
FirebaseError
assert
calculateBackoffMillis
getModularInstance
isIndexedDBAvailable

      + assert

Test Logs

  1. https://storage.googleapis.com/firebase-sdk-metric-reports/Gx85sYxWzx.html

@Samruddhi90
Implement Realtime Autofetch on Config Update Notifications (#9206)
bbdcc3c 
Adds logic to listen for realtime update notifications. When a new template version is detected, it automatically fetches the config. After a successful fetch, a callback is triggered to notify the app that a new config version has been retrieved and is ready to be activated.
@tusharkhandelwal8 tusharkhandelwal8 marked this pull request as ready for review August 21, 2025 17:51
@tusharkhandelwal8 tusharkhandelwal8 requested review from a team and erikeldridge as code owners August 21, 2025 17:51
hsubox76
hsubox76 reviewed Aug 21, 2025
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LG for the most part - mostly just nits and doc comments.

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@hsubox76 hsubox76 hsubox76 left review comments

@ashish-kothari ashish-kothari Awaiting requested review from ashish-kothari

@dsjadaun-google dsjadaun-google Awaiting requested review from dsjadaun-google

@erikeldridge erikeldridge Awaiting requested review from erikeldridge erikeldridge is a code owner

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4 participants
@tusharkhandelwal8 @google-oss-bot @hsubox76 @Samruddhi90